All Sail, No Anchor III: Risk Aggregation and Time’s Arrow

  • Bob Blakley
  • G. R. Blakley
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3574)


This paper explains why protection mechanisms which distribute even the protected forms of information assets lead to increased risks. It describes a mechanism (called a ”lethal secret sharing system”) which enables the imposition of ”forgetfulness” by an asset owner on the receiver of a protected asset. This forgetfulness, or ”lethe”, is enforced by allowing the asset owner to give information about a piece of knowledge to the asset receiver in such a way that the receiver can be prevented at a future time from using the knowledge to recover the information.


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  1. 1.
    Blakley, B., Blakley, G.R.: All Sail, No Anchor I: Cryptography, Risk, and e- Commerce. In: Clark, A., Boyd, C., Dawson, E. (eds.) ACISP 2000. LNCS, vol. 1841, pp. 471–476. Springer, Heidelberg (2000)CrossRefGoogle Scholar
  2. 2.
    Blakley, G.R.: Safeguarding Cryptographic Keys. In: Proceedings of the National Computer Conference, American Federation of Information Processing Societies Press, June 1979, vol. 48, pp. 242–268 (1979)Google Scholar
  3. 3.
    Blakley, G.R., Meadows, C.: Security of Ramp Schemes. In: Blakely, G.R., Chaum, D. (eds.) CRYPTO 1984. LNCS, vol. 196, pp. 242–268. Springer, Heidelberg (1985)CrossRefGoogle Scholar
  4. 4.
    FitzGerald, Edward, tr.: The Rubaiyat of Omar Khayyam. In: Decker, C. (ed.) Bibliographical Society of the University of Virginia (1997) Google Scholar
  5. 5.
    Shamir, A.: How to Share a Secret. Communications of the ACM 24(11), 612–613 (1979)CrossRefMathSciNetGoogle Scholar
  6. 6.
    Virgil: “Opera”. In: Mynors, R.A.B. (ed.) Aeneid 6.705. Oxford University Press, Oxford (1969)Google Scholar
  7. 7.
    Von Neumann, J., Morgenstern, O.: Theory of Games and Economic Behavior. Princeton University Press, Princeton (1953)zbMATHGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Bob Blakley
    • 1
  • G. R. Blakley
    • 2
  1. 1.IBMAustinUSA
  2. 2.Texas A&M UniversityCollege StationUSA

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